作者:Andrew G. Cole、Axel Metzger、Gulzar Ahmed、Marc-Raleigh Brescia、Ray J. Chan、James Wen、Linda O’Brien、Lan-Ying Qin、Ian Henderson
DOI:10.1016/j.tetlet.2006.10.050
日期:2006.12
A general and efficient solid-phase synthesis of N-9-substituted 2,8-diaminopurines from 5-nitrouracil is described. The key synthetic transformation employs a carbodiimide-mediated cyclization of a thiourea. Thiourea formation on solid phase is performed using both thermal and microwave reaction conditions. Regiospecific solution-phase synthesis of key building blocks allows the incorporation of desired substituents at N-9 of the purine nucleus. (c) 2006 Elsevier Ltd. All rights reserved.